Chrysoberyl and Afghanite Optical Properties

Chrysoberyl

Afghanite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

X = red; Y = yellow-orange; Z = emerald-green

Not Available

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

Transparent, Gemstones (2009)

1.5 Refractive Index

1.746-1.7631.523

1 3.25

1.6 Optic Character

Biaxial/+

Not Available

1.7 Crystal System

Orthorhombic

Trigonal

1.8 Birefringence

0.007-0.0130.006

0 0.296

1.9 Clarity

Transparent

Chrysoberyl and Afghanite Optic Character

Chrysoberyl and Afghanite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Chrysoberyl and Afghanite Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Chrysoberyl and Afghanite optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character. Chrysoberyl has Biaxial/+ character.

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Chrysoberyl and Afghanite Transparency

Similar to their colors, Chrysoberyl and Afghanite transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Chrysoberyl is Translucent, Transparent and Transparent to translucent while Chrysoberyl is Translucent, Transparent and Transparent to translucent in appearance.